84 disinfectant can not kill tuberculosis bacillus, tuberculosis bacillus resistance to chemical disinfectants is relatively strong, so 84 disinfectant can not kill tuberculosis bacillus. After the human body is infected by tuberculosis bacillus, when the body’s immune function is low or the defense function is reduced, it can cure the disease, which can cause tuberculosis meningitis, tuberculosis, intestinal tuberculosis, kidney tuberculosis and other diseases. Therefore, we must actively prevent tuberculosis infection, increase nutrition, enhance the body’s resistance, avoid overwork and cold. At the same time, we should actively give BCG vaccination to prevent tuberculosis.